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After correcting the original service problem, perform the following 
safety checks before releasing the set to the customer:

1.  Check the area of your repair for unsoldered or poorly soldered 

connections. Check the entire board surface for solder splashes and 
bridges.

2.  Check the interboard wiring to ensure that no wires are “pinched” or 

touching high-wattage resistors.

3.  Check that all control knobs, shields, covers, ground straps, and 

mounting hardware have been replaced. Be absolutely certain that 
you have replaced all the insulators.

4.  Look for unauthorized replacement parts, particularly transistors, 

that were installed during a previous repair. Point them out to the 
customer and recommend their replacement.

5.  Look for parts which, though functioning, show obvious signs of 

deterioration. Point them out to the customer and recommend their 
replacement.

6.  Check the line cords for cracks and abrasion. Recommend the 

replacement of any such line cord to the customer.

7.  Check the antenna terminals, metal trim, “metallized” knobs, screws, 

and all other exposed metal parts for AC leakage. Check leakage as 
described below.

The AC leakage from any exposed metal part to earth ground and 
from all exposed metal parts to any exposed metal part having a 
return to chassis, must not exceed 0.5 mA (500 microamperes). 
Leakage current can be measured by any one of three methods.

1.  A commercial leakage tester, such as the Simpson 229 or RCA 

WT-540A. Follow the manufacturers’ instructions to use these 
instructions.

2.  A battery-operated AC milliampmeter. The Data Precision 245 

digital multimeter is suitable for this job.

3.  Measuring the voltage drop across a resistor by means of a VOM 

or battery-operated AC voltmeter. The “limit” indication is 0.75 
V, so analog meters must have an accurate low voltage scale. 
The Simpson’s 250 and Sanwa SH-63TRD are examples of 
passive VOMs that are suitable. Nearly all battery-operated digital 
multimeters that have a 2 VAC range are suitable (see Figure A).

How to Find a Good Earth Ground
A cold-water pipe is a guaranteed earth ground; the cover-plate 
retaining screw on most AC outlet boxes is also at earth ground. If the 
retaining screw is to be used as your earth ground, verify that it is at 
ground by measuring the resistance between it and a cold-water pipe 
with an ohmmeter. The reading should be zero ohms.

If a cold-water pipe is not accessible, connect a 60- to 100-watt 
trouble- light (not a neon lamp) between the hot side of the receptacle 
and the retaining screw. Try both slots, if necessary, to locate the hot 
side on the line; the lamp should light at normal brilliance if the screw 
is at ground potential (see Figure B).

Trouble Light

AC Outlet Box

Ohmmeter

Cold-water Pipe

Figure A. Using an AC voltmeter to check AC leakage.

Figure B. Checking for earth ground.

(1) POWER

TOP PANEL BUTTON

(2) CHANNEL +

(4) VOLUME +

(3) CHANNEL -

(5) VOLUME -

(6) TV/VIDEO

(7) WEGA GATE

(8) ENTER

(1) POWER

FRONT PANEL LED

(2) TIMER

(3) PIC OFF

* Light is green when the TV set is on
* Functions as failure indicator
* Blinks green in aging mode

TIMER LED

Red LED

Lights when timer is set

PIC OFF LED

Green LED

Lights when power saving setting is set to 
picture off (See Instruction Manual)

POWER LED

Red/Green LED

STATUS

POWER LED

TIMER LED

PICTURE OFF 

LED

REMARKS

Power Off

Off

Off

Off

Power off using the power switch or 
remote control.  NOTE: Standby 
state does not exist in WAX; 
however, the microcomputer does 
enter into sleep mode.

Power Off

Lights Green

Off

Off

Microcomputer working normally.

Failure

Blinks Red

Off

Off

Failure causes are classified by the 
number of time the red light blinks.

Aging

Blinks Green

Off

Off

Aging mode is classified by a blinking 
green light.

Picture Off

Lights Green

Off

Lights Green

No display (black screen).

Lights Green

Lights Red

Off

When SLEEP TIMER is set during 
power on.

Lights Green

Lights Red

Lights Green

When SLEEP TIMER is set in 
Picture Off mode.

Off

Lights Red

Off

When ON TIMER is set and power is 
off.

Lights Green

Lights Red

Off

When ON TIMER is set and power is 
on.

Lights Green

Lights Red

Lights Green

When ON TIMER is set in Picture Off 
mode.

SLEEP TIMER

ON TIMER

The units in this manual contain a self-diagnostic function. If an error occurs, the POWER LED will automatically begin to fl ash. The number of times 
the LED fl ashes translates to a probable source of the problem. A defi nition of the POWER LED fl ash indicators is listed in the instruction manual for 
the user’s knowledge and reference. If an error symptom is diffi cult to reproduced use the Remote Commander to display the record that is stored at 
the internal NVM to specify the cause of the failure.

Diagnostic Test Indicators
When an error occurs, the POWER LED will fl ash a set number of times to indicate the possible cause of the problem. If there is more than one error, 
the LED will identify the fi rst of the problem areas. If the errors occur simultaneously, the one that corresponds to the fewest fl ashes is identifi ed fi rst.
Results for all of the following diagnostic items are displayed on screen.  No error has occurred if the screen displays a “0”.

Number of Times 

POWER LED Blinks

Monitoring Item

1 Time

Abnormal AU Power Voltage (DCALERT 3)

2 Times

Abnormal D5V/A9V Power Voltage (DCALERT 2)

3 Times

Abnormal Panel Voltage (DCALERT 1)

4 Times

Backlight Failure

5 Times

Abnormal Main Power Voltage

6 Times

Abnormal Speaker Voltage

7 Times

Internal Temperature Rise (mainly on the panel side)

1 Eight screws
     (+PSW 4X10)

2 Seven screws
     (+BVTP 3X10)

3 Rear cabinet assy (40U)

1 Four screws
     (+PSW 5X16)

2 Stand assy